/*去掉默认的样式*/

body{
    margin: 0px;
    padding: 0px;
}

button{
    margin: 0px;
    padding: 0px;
    border: 0px;
    outline: none;
    background-color: transparent;
}

*{
    /* 文字 */
    font-family: Helvetica,Arial,Verdana,sans-serif;
}

*::selection{
    background-color: rgba(169, 169, 169, 0.6);
}

div,button,a{
    /*让图片清晰*/
    backface-visibility:hidden;
    -webkit-backface-visibility:hidden;
    -moz-backface-visibility:hidden;
    -ms-backface-visibility:hidden;

    /*图片*/
    background-repeat: no-repeat;
    background-size: 100% 100%;
    
    /*清除移动端的点击高亮*/
    -webkit-tap-highlight-color: transparent;
    /*禁用长按页面时 弹出的菜单*/
    -webkit-touch-callout:none;
}

a{
    text-decoration: none;
    display: block;
}